Plow.



Y'front end and draws the plow.

LEWIS H. OLSON, OF MELVILLE, SASKATCHEWAN, CANADA, ASSIGNOR OF ONE-HALFT0 MARTIN ERICKSON, OF GALESBURG, NORTH DAKOTA.

PLOW.

amasar.

Specification of Letters Patent.

Patented Nov. 18, 1913.

Application filed .Tune 4,-1913. Serial No. 771,692. l

To zZ-Z whomvz't may conce/rn.'

ing is a specication.

My invention relates to plows, and the object is to provide a lplowwhich Vwill autof matically free itself from obstruction in the: groundwithout breaking or injuring any of `end issecured at26 to one of theside bars 4.

its parts or connections.

In the accompanying drawing, Figure 1 is a top view of my improved plowshown as attached to some means for drawing it. Fig. 2 is a sideelevation of what vis shown vin Fig. 1. Fig. 3 is an enlarged partlysec` tional portion of Fig. 2, about as on the line L1-ain Fig. 4. Fig.4 is an enlarged portion of Fig. 1. Fig. 5 is a detail view of oneof thespring devices arranged one at each side upon the beam sections of theplow.

Referring to the drawing-by reference numerals, 1 designates the share,2 the mold board and 3 the landside of the plow. Suit- .ably-secured tosaid parts is a plow beam which is composed of two sections, 4 and 5grJ-he front section 4.may be hitched by astaple 6, or other means, to aportion 7 of al tractor or otherdevice which 'supports said Said frontsection is bifurcated into two flat side bars of which one isoffset asat 4a in Fig. 1 so as to leave the required room for the insertion of acolter (not shown) in the front part of the section.V Said section isalso providedin each side bar with a slotS and in the rear ends withslots` 9; The rear beam section is a fiat curved member insertedbetweenthe rearward bars of the front section, and is` provided witht-runnions 10 having antifric-l tion rollers 11 moving in theslotsY 9,said rollers are retained bylarge washers 12 (seel v17 and has its endsprojected outward through the slots 8 of the side bars and has one endprovided with a large head 18 and the other with a. fixed washer 19 (seeFig. 4). Said pivot 16 is thus slidable in the .slots 8 while its headand washer aid in preu Be it known that I, Lnwrs H. OLSON, subject ofthe King of Great Britain, resid ing at the town of Melville, in theProvince; of Saskatchewan, Canada, have invented ag new and useful Plow,of which the follow-g a rod 20, whose front end is pivotally seventingspreading ofthe bars of the front section 4. The trunnions 10 and abrace bolt 34 also aid in said act of preventing spreading. v

In the front end of the block 17 is secured cured at 21 to a hand lever22, which is pivoted at 23 to one of the bars 4. In a recess `in theblock 1'7 is a stud 24, to which is attached one end of a spring 25,whose other As best shown in Fig. 3, when the lever 22 is thrown forwardto its limit the end 21 of the rod 20 will be'slightly lower than thevfulcrum 23 ofthe lever, and thus the spring 25 is held compressed andthe roller 15 out ofthe notch 14 as long as the lever is in its 4forwardposition, but as soon as the lever is `raised and released the spring 25will throw it to the full line position shown in `Figsl and 2 and theroller 15 into the notch 14 ofthe rear section, which section is therebylocked against premature tilting on its trunnions. Such tilting can onlytake place `if the operator pulls the lever 22 to its forward `positionfor hauling the plow idle in `one of the positions shown in dotted linesin fFig. 2; or, if the plow meets with so great 4a. resistance in theground from rocks, roots of trees or thelike, that the front beamsection moves forward on the rear section as far as the slot 9 willpermit, thus permitting the front point laof the `cam 13 to pass 12, andits other arm connected by a contracting coil spring 31 with a bolt 32Vwhich ,is slidable in said angular portion and is provided with a nut33 by which to regulate the tension of the spring.

It is obvious that the spring arrangement just described and the roller15 will sustain the strain of all ordinary plowing and for eXtra hardsoil or other breakable obstructions a slight relative movement of thefront beam section, faster than the rear section, will cause the rod 29to partly tilt the beam 28 and thereby increase the tension of thespring 3l so that it will resist the receding of the rear beam sectionuntil the obstruction reaches the point of danger of breaking some partof the plow when the springs 31 will yield sufficiently to let the notch11i leavethe roller l5. After the plow has passed over the obstructionits rear beam section may be turned to normal position again by backingthe plow, or by hand, or by any other suitable means, and when thusturned the cam 13 will act on the roller l5 and compress the spring 25until the roller l5 slips into the notch 14.

What l claim is l. In a plow, a plow beam composed of a `front sectionby which the plow is drawn, a rearwardly spring-pressed member mountedon the section and having a limited slidable movement in longitudinaldirection of the section, a rear beam section pivotally secured to therear end of the front section to tilt on a horizontal transverse aXisthereon and having a longitudinal play at said pivot joint, the frontend of said rear section being adapted for engagement with thespring-pressed member, to prevent premature tilting of the rear section,and one or more springs arranged to resist rearward movement of the rearsection.

2. ln a plow, a plow beam composed of a Vfront section by which the plowis drawn, a

rearwardly spring-pressed member mounted onthe section and having alimited slidable movement in longitudinal direction of the section, arear beamsection pivotally se- Y cured to the rear end of the frontsection to tilt on a horizontal transverse axis thereon and having alongitudinal play at said pivot }oint, the front end of said rearsection heine' adapted. for enUaGement Vwith the nu A b spring-pressedmember, to prevent premature tilting of the rear section, and springsarranged to resist rearward movement or" the rear section, and amechanism connected with said springs, for automatically increasing thetension of the springs, when the rear section slides rearwardly.

3. ln a plow, a plow beam composed of a front section by which the plowis to be drawn, a rearwardly spring-pressed member mounted on thesection and having a limited sliding` movement in longitudinal directionof the section, a rear beam section pivotally secured in the rear end otthe front section and carrying at its rear end a plow, the front end ofsaid rear section having a notch adapted to receive the springpressedmember, and above said notch a cam adapted to press the spring-pressedmember forward when the rear section is returning from a tilted to anormal position, and means for pulling the spring-pressed member forwardfrom the notch, and comparatively strong springs connecting the beamsections together, said sections having a longitudinal play in relationto each other.

t. n a plow, the combination with a rearwardly biiurcated front beamsection having near its middle and also near its rear end a longitudinal'slot in each side, a rear beam section having trunnions extendingoutward through said rear slots and provided with Xed collars which aidin preventing spreading of the biurcated portion, said rear section alsohaving in its front end a notch and an incline above the notch, a forkedblock slidable in the front beam section, a pivot extending through theforked portion ot the block and having its ends-projected outwardthrough the slots near the middle of the beam section, and provided withmeans outside the beam section for preventot spreading o thebifurcation, a roller mounted on the pivot within the 'fork and adaptedto engage in the notch of the `rear section and lock the latter againstpremature tilting, a spring arranged to press thetorlred blockrearwardly as far as the slots for the pivot will permit, a manuallyoperated selflocling lever mounted in the front part of the frontsection and having a rod connecting it with the block; a two-armed leverfulcrumed upon Yeach side ot the rear partot the front section, apulling coil spring connecting one end of said lever with the collar onthe trunnion, and a rod pivotally connecting the other end ot the leverwith one of the said collars.

ln testimony whereof l aiiix my signature, in presence of two witnesses.

Y LEVl/TS H. OLSON. llitnesses:

LOUIS T. MCKIM, GEO. T. KILLAM.

Copies of this patent may be obtained for ive cents each, by addressingthe "Commissioner of latents, Washington, D. C.

